Package javassist.bytecode

Class LocalVariableAttribute

java.lang.Object
javassist.bytecode.AttributeInfo
javassist.bytecode.LocalVariableAttribute
Direct Known Subclasses:
LocalVariableTypeAttribute
public class LocalVariableAttribute extends AttributeInfo
LocalVariableTable_attribute.

  • Field Details

  • Constructor Details

    • LocalVariableAttribute

      public LocalVariableAttribute(ConstPool cp)
      Constructs an empty LocalVariableTable.

    • LocalVariableAttribute

      @Deprecated public LocalVariableAttribute(ConstPool cp, String name)
      Deprecated.
      Constructs an empty LocalVariableTable.
      Parameters:
      name - the attribute name. LocalVariableAttribute.tag or LocalVariableAttribute.typeTag.
      Since:
      3.1
      See Also:

  • Method Details

    • addEntry

      public void addEntry(int startPc, int length, int nameIndex, int descriptorIndex, int index)
      Appends a new entry to local_variable_table.
      Parameters:
      startPc - start_pc
      length - length
      nameIndex - name_index
      descriptorIndex - descriptor_index
      index - index

    • shiftIndex

      public void shiftIndex(int lessThan, int delta)
      For each local_variable_table[i].index, this method increases index by delta.
      Parameters:
      lessThan - the index does not change if it is less than this value.

    • tableLength

      public int tableLength()
      Returns local_variable_table_length. This represents the number of entries in the table.

    • startPc

      public int startPc(int i)
      Returns local_variable_table[i].start_pc. This represents the index into the code array from which the local variable is effective.
      Parameters:
      i - the i-th entry.

    • codeLength

      public int codeLength(int i)
      Returns local_variable_table[i].length. This represents the length of the code region in which the local variable is effective.
      Parameters:
      i - the i-th entry.

    • nameIndex

      public int nameIndex(int i)
      Returns the value of local_variable_table[i].name_index. This represents the name of the local variable.
      Parameters:
      i - the i-th entry.

    • variableName

      public String variableName(int i)
      Returns the name of the local variable specified by local_variable_table[i].name_index.
      Parameters:
      i - the i-th entry.

    • variableNameByIndex

      public String variableNameByIndex(int index)
      Returns the name of the local variable with given index. If you want to get the parameter name of method with correct order, you should using this method.
      Parameters:
      index - the index of the local variable.

    • descriptorIndex

      public int descriptorIndex(int i)
      Returns the value of local_variable_table[i].descriptor_index. This represents the type descriptor of the local variable.

      If this attribute represents a LocalVariableTypeTable attribute, this method returns the value of local_variable_type_table[i].signature_index. It represents the type of the local variable.

      Parameters:
      i - the i-th entry.

    • signatureIndex

      public int signatureIndex(int i)
      This method is equivalent to descriptorIndex(). If this attribute represents a LocalVariableTypeTable attribute, this method should be used instead of descriptorIndex() since the method name is more appropriate.
      Parameters:
      i - the i-th entry.
      See Also:

    • descriptor

      public String descriptor(int i)
      Returns the type descriptor of the local variable specified by local_variable_table[i].descriptor_index.

      If this attribute represents a LocalVariableTypeTable attribute, this method returns the type signature of the local variable specified by local_variable_type_table[i].signature_index.

      Parameters:
      i - the i-th entry.

    • signature

      public String signature(int i)
      This method is equivalent to descriptor(). If this attribute represents a LocalVariableTypeTable attribute, this method should be used instead of descriptor() since the method name is more appropriate.

      To parse the string, call toFieldSignature(String) in SignatureAttribute.

      Parameters:
      i - the i-th entry.
      See Also:

    • index

      public int index(int i)
      Returns local_variable_table[i].index. This represents the index of the local variable.
      Parameters:
      i - the i-th entry.

    • copy

      public AttributeInfo copy(ConstPool newCp, Map<String,String> classnames)
      Makes a copy.
      Overrides:
      copy in class AttributeInfo
      Parameters:
      newCp - the constant pool table used by the new copy.
      classnames - should be null.